--- include/IrrCompileConfig.h
+++ include/IrrCompileConfig.h
@@ -245,7 +245,7 @@
 //! Define _IRR_USE_NON_SYSTEM_JPEG_LIB_ to let irrlicht use the jpeglib which comes with irrlicht.
 /** If this is commented out, Irrlicht will try to compile using the jpeg lib installed in the system.
 	This is only used when _IRR_COMPILE_WITH_LIBJPEG_ is defined. */
-#define _IRR_USE_NON_SYSTEM_JPEG_LIB_
+//#define _IRR_USE_NON_SYSTEM_JPEG_LIB_
 #ifdef NO_IRR_USE_NON_SYSTEM_JPEG_LIB_
 #undef _IRR_USE_NON_SYSTEM_JPEG_LIB_
 #endif
@@ -261,7 +261,7 @@
 //! Define _IRR_USE_NON_SYSTEM_LIBPNG_ to let irrlicht use the libpng which comes with irrlicht.
 /** If this is commented out, Irrlicht will try to compile using the libpng installed in the system.
 	This is only used when _IRR_COMPILE_WITH_LIBPNG_ is defined. */
-#define _IRR_USE_NON_SYSTEM_LIB_PNG_
+//#define _IRR_USE_NON_SYSTEM_LIB_PNG_
 #ifdef NO_IRR_USE_NON_SYSTEM_LIB_PNG_
 #undef _IRR_USE_NON_SYSTEM_LIB_PNG_
 #endif
@@ -598,7 +598,7 @@
 /** If this is commented out, Irrlicht will try to compile using the zlib
 installed on the system. This is only used when _IRR_COMPILE_WITH_ZLIB_ is
 defined. */
-#define _IRR_USE_NON_SYSTEM_ZLIB_
+//#define _IRR_USE_NON_SYSTEM_ZLIB_
 #ifdef NO_IRR_USE_NON_SYSTEM_ZLIB_
 #undef _IRR_USE_NON_SYSTEM_ZLIB_
 #endif